Kallithea issues archive

When migrating by alembic in an environment where kallithea == 0.5.1 is installed by pip, an error occurs.
I think the cause itself is simple and lack of 'import os'.

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Will this be fixed in the version installed by pip?

The traceback is included just in case.

Traceback (most recent call last):
File "/usr/local/bin/alembic", line 11, in <module>
load_entry_point('alembic==1.0.11', 'console_scripts', 'alembic')()
File "/usr/local/lib/python2.7/dist-packages/alembic/config.py", line 540, in main
CommandLine(prog=prog).main(argv=argv)
File "/usr/local/lib/python2.7/dist-packages/alembic/config.py", line 534, in main
self.run_cmd(cfg, options)
File "/usr/local/lib/python2.7/dist-packages/alembic/config.py", line 514, in run_cmd
**dict((k, getattr(options, k, None)) for k in kwarg)
File "/usr/local/lib/python2.7/dist-packages/alembic/command.py", line 276, in upgrade
script.run_env()
File "/usr/local/lib/python2.7/dist-packages/alembic/script/base.py", line 475, in run_env
util.load_python_file(self.dir, "env.py")
File "/usr/local/lib/python2.7/dist-packages/alembic/util/pyfiles.py", line 90, in load_python_file
module = load_module_py(module_id, path)
File "/usr/local/lib/python2.7/dist-packages/alembic/util/compat.py", line 237, in load_module_py
mod = imp.load_source(module_id, path, fp)
File "/usr/local/lib/python2.7/dist-packages/kallithea/alembic/env.py", line 47, in <module>
{'file': config.config_file_name, 'here': os.path.dirname(config.config_file_name)},
NameError: name 'os' is not defined

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